San Mateo, CA planting zone & frost dates
San Mateo is in USDA hardiness zone 10a. Frost is rare here: in most years temperatures do not drop to 32°F.
USDA hardiness zone10aavg. extreme winter low 30°F to 35°F
FrostRarein most years the nearest weather station records no 32°F freeze
Useful for zone 10a gardens
- Drip irrigation kit — saves water in long, hot seasons
- Shade cloth — protects plants from midday sun
- Soil moisture meter
- Plants for zone 10
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Hardiness zone by ZIP code in San Mateo
- 94401 zone 10a
- 94402 zone 10a
- 94403 zone 10a
- 94404 zone 10a
- 94497 zone 10a
Nearby cities
- Burlingame zone 10a
- Foster City zone 10a, last frost Jan 17
- Hillsborough zone 10a
- Belmont zone 10a, last frost Jan 17
- Millbrae zone 10a
- San Carlos zone 10a, last frost Jan 17
- San Bruno zone 10a
- Redwood City zone 10a, last frost Jan 17
Questions
What growing zone is San Mateo, CA?
San Mateo is in USDA Plant Hardiness Zone 10a (average extreme winter low 30°F to 35°F), according to the USDA 2023 map.
Frost dates: NOAA U.S. Climate Normals 1991–2020, station San Francisco Intl Ap, CA (USW00023234), 7.2 km (4.5 mi) from the city center, elevation 2 m, based on 26 years of records. Hardiness zone: USDA Plant Hardiness Zone Map 2023 for the ZIP code nearest to the city center. Microclimates (valleys, hills, cities, coasts) can be warmer or colder: check the local forecast before planting. How we calculate the data.